huntington



(No Model.) F. A, HUNTINGTON.

Ore Crusher and Pulverizer. No. 236,333. Patented .Ian. 4,1881;

Witnesses UNITE terns? ATENT rice.

'FRANK A; HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

ORE CR'USHER AND PVULVERIZER.

SPECIFICATION forming part of Letters Patent No. 236,333, dated January 4,.1881.

Application filed May 1 1-, 1880. (No model.) i

, and exact description thereof.

My invention relates to certain improvements in that class of ore-crushing appliancesin which the ore is broken and pulverized undera stamp or by impact of a'weight.

My improvements consist in placing in a peculiarly-shaped mortar or battery a bifurcated weight or stamp, said bifurcated weight being oscillated or rocked back and forth by means of a pitman at its upper end connected to a crank shaft. The legs of the weight, which are provided with shoes, are thus alternately brought down onto the quartz fed under them, and the quartz is crushed, the center of motion is at each alternate movement thrown to the outer side of the resting stamp, and the weight of both legs is utilized in breaking the rock, as is more fully describedin the accompanyingdrawings, in which- Figure l is a view of my ore-crusher. Fig. 2 is a modification.

Let A represent the mortar or battery in which the bifurcated weight or stamp B moves, said mortar being provided with removable (lies a, such as are commonly used in quartzmills. Each leg I) of the weightB is alsoprovided with removable shoes at, similar to those supplied to the ordinary quartz-stamp. At

the upper end of the bifurcated stamp is a pitman, 0, connecting with the crank-wheel D, to which any suitable power is applied.

The outer corners of the shoes a are rounded slightly to allow them to tilt easily. As the pitman throws the upper end of the bifurcated stamp or weight forward, said stamp moves over on the arc of a circle, of which the rounded corner of the shoe to is the center, the other leg, b, rising up. As the crank and pitmau draw the upper end of the weight back, the leg which has been lifted is brought back down on top of the ore which has fallen in under it, crushing said ore as it falls. This leg then becomes the point about which the weight moves as the other leg is raised in its turn.

Thealternate rocking of the bifurcated weight brings first one leg in contact with the ore, and then the other, the ore being rapidly crushed, and the whole weight of the stamp never having to be lifted. When, however, the weight begins to fall, all the weight of both legs is imparted to the blow that the falling one delivers. The lower shod ends of the legs I) always keep in the proper position, since the rounded corners of the shoes a, moving in the mortar corners, give them a tendency to move toward the center at each blow. This peculiar motion is attended with a grinding or pulverizing action as the stamp is shifted in either direction.

On the upper part of the bifurcated weight is placed. a double inclined or beveled lug, E, which is intended to operate the lever of an automatic ore-feeder. At each oscillation of the weight this lug comes in contact with the lever to operate the feeder; but as the stamp is raised by sufficient ore being under it, this lug is also raised, and will not impinge on the lever.

By rounding off the outer lower corners of the shoes the said legs of the stamp are kept to the center, since they cannot get too near the sides, sliding or slipping off the backing- .piece pin the corner of the mortar back into their normal position.

Very little power is required to operatethis bifurcated stamp or weight, while its action is very effective. One stamp acts as a fulcrum to raise the other, the action, being alternate.

By allowing a little clearance to the legs, by making the mortar wider than they are, when the leg of the stamp comes down, it slides forward, pulverizing the ore under it, after having first crushed it by the blow. The backingpieccs p are fitted in behind the dies, and said backing-pieces are beveled, as shown. By making them in this shape, when the rounded corner of the shoe slides against the lower corner of the back plate, the leg can be tipped without striking against the back plate and being forced forward.

Fig. 2 shows a modification whereby I utilize old stamps and stamp-rods N and N, by rigidly securing them, by means of nuts 0 O,

to arms D, having a vertical projection, E, pivoted t0 the pitman in the same manner as shown in Fig. 1.

It will be observed that there is no central bearing-shaft in mypresent device, as is shown in my patent of December 10, 1878, and by avoiding its use I get at each blow all the crushing effect of the weight of the entire machine.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A bifurcated crusher and devices for oscillating it, in combination with dies to a, substantially as and for the purpose set forth.

2. The bifurcated stamp B and mechanism to oscillate the same, in combination with the mortar A, provided with the dies to a; and the FRANK A. HUNTINGTON.

Witnesses:

S. H. NOURSE, FRANK A. BROOKS. 

